Android工具类-关于网络、状态的工具类

public class NetworkUtils {  
  
    /** 
     * 网络是否可用 
     *  
     * @param activity 
     * @return 
     */  
    public static boolean isNetworkAvailable(Context context) {  
        ConnectivityManager connectivity = (ConnectivityManager) context  
                .getSystemService(Context.CONNECTIVITY_SERVICE);  
        if (connectivity == null) {  
        } else {  
            NetworkInfo[] info = connectivity.getAllNetworkInfo();  
            if (info != null) {  
                for (int i = 0; i < info.length; i++) {  
                    if (info[i].getState() == NetworkInfo.State.CONNECTED) {  
                        return true;  
                    }  
                }  
            }  
        }  
        return false;  
    }  
  
  
    /** 
     * Gps是否打开 
     *  
     * @param context 
     * @return 
     */  
    public static boolean isGpsEnabled(Context context) {  
        LocationManager locationManager = ((LocationManager) context  
                .getSystemService(Context.LOCATION_SERVICE));  
        List<String> accessibleProviders = locationManager.getProviders(true);  
        return accessibleProviders != null && accessibleProviders.size() > 0;  
    }  
  
    /** 
     * wifi是否打开 
     */  
    public static boolean isWifiEnabled(Context context) {  
        ConnectivityManager mgrConn = (ConnectivityManager) context  
                .getSystemService(Context.CONNECTIVITY_SERVICE);  
        TelephonyManager mgrTel = (TelephonyManager) context  
                .getSystemService(Context.TELEPHONY_SERVICE);  
        return ((mgrConn.getActiveNetworkInfo() != null && mgrConn  
                .getActiveNetworkInfo().getState() == NetworkInfo.State.CONNECTED) || mgrTel  
                .getNetworkType() == TelephonyManager.NETWORK_TYPE_UMTS);  
    }  
  
    /** 
     * 判断当前网络是否是wifi网络 
     * if(activeNetInfo.getType()==ConnectivityManager.TYPE_MOBILE) {  
     *  
     * @param context 
     * @return boolean 
     */  
    public static boolean isWifi(Context context) {  
        ConnectivityManager connectivityManager = (ConnectivityManager) context  
                .getSystemService(Context.CONNECTIVITY_SERVICE);  
        NetworkInfo activeNetInfo = connectivityManager.getActiveNetworkInfo();  
        if (activeNetInfo != null  
                && activeNetInfo.getType() == ConnectivityManager.TYPE_WIFI) {  
            return true;  
        }  
        return false;  
    }  
  
    /** 
     * 判断当前网络是否3G网络 
     *  
     * @param context 
     * @return boolean 
     */  
    public static boolean is3G(Context context) {  
        ConnectivityManager connectivityManager = (ConnectivityManager) context  
                .getSystemService(Context.CONNECTIVITY_SERVICE);  
        NetworkInfo activeNetInfo = connectivityManager.getActiveNetworkInfo();  
        if (activeNetInfo != null  
                && activeNetInfo.getType() == ConnectivityManager.TYPE_MOBILE) {  
            return true;  
        }  
        return false;  
    }  
}  

tv_result.append("网络是否可用:"+NetworkUtils.isNetworkAvailable(MainActivity.this)+"\n");  
tv_result.append("GPS开关是否打开:"+NetworkUtils.isGpsEnabled(MainActivity.this)+"\n");  
tv_result.append("是否为3G网络:"+NetworkUtils.is3G(MainActivity.this)+"\n");  
tv_result.append("WIFI是否打开:"+NetworkUtils.isWifiEnabled(MainActivity.this)+"\n");  
tv_result.append("是否为WIFI网络:"+NetworkUtils.isWifi(MainActivity.this)+"\n");